Broadcast

Here I gave a brief explanation just to understand what Broadcast means.

Broadcast:  (One to All)

         

This is a way to find the right person to communicate. To understand, if we want to communicate with John but we don’t know who is John in the group before us. So we shout “Hey John”, everyone will hear what we shout but only john reply back “Hey it’s me”, then we start our communication with him.

Likewise if a computer don’t know the destination Address of which it has to establish communication, so it simply send a broadcast, every computer in the local network receives the broadcast and only the concern computer reply back.

Limited Broadcast:

If a destination MAC address looks like FF: FF: FF: FF: FF: FF then it will be forwarded to all the computers in the Network, it’s a Broadcast MAC address.

Broadcast IP must be set to 255.255.255.255 which means the packet will be forwarded to all computers in the Network.

This type of Broadcast Never crosses over the router.

Directed Broadcast:

It broadcasts only to a specified Networks Computer. This type of Broadcast crosses over the router. In this type of Broadcast only the host part of IP is defined as 255.

Example:

          10.0.0.0 /24 – It means the last octet is Host part

          So Broadcast address for this Network is 10.0.0.255